Assembly and mass production use. Anchor bolt installation. Single-function type. Since the torque value cannot be adjusted externally without a dedicated tool, there is no need to worry about changing the torque during use. When the set torque is reached, the toggle activates, and the tightening completion can be sensed with a light and clear signal sound. The head ratchet has 24 teeth, and a swing width of 15°, demonstrating its power in tight spaces. The QSP/QSP-MH series complies with ISO6789:2017 from January 1, 2022. For details, please see the technical document "Efforts toward ISO6789:2017" at the bottom of the screen.